In a statement, the U.S. president said, "I don't need a photo-op, and the last thing I want to do is to be in any way obtrusive at a time when the family is concerned about Nelson Mandela's condition. I've had the opportunity to meet with him. Michelle and the girls had an opportunity to meet with him. Right now, our main concern is with his well-being, his comfort, and with the family's well-being and comfort."